Source comparison
MK-677 Real vs Fake: Verification Comparison
Appearance (Lyophilised) White to off-white crystalline powder, uniform texture, no clumping Yellow, beige, or visibly clumped powder; uneven texture indicating spray-drying instead of lyophilisation Colour deviation indicates oxidation or impurities; clumping
This comparison does not assign a generated winner or score.
- Appearance (Lyophilised)
- White to off-white crystalline powder, uniform texture, no clumping
- Yellow, beige, or visibly clumped powder; uneven texture indicating spray-drying instead of lyophilisation
- Colour deviation indicates oxidation or impurities; clumping suggests improper manufacturing
- Reconstitution Time
- Complete dissolution in bacteriostatic water within 45–60 seconds at room temperature
- Cloudiness, floating particles, or incomplete dissolution after 90+ seconds
- Incomplete dissolution is the fastest red flag for contamination or substitution
- COA Documentation
- Batch-specific HPLC chromatogram + mass spectrometry confirming 528.662 g/mol + ≥98% purity + ISO 17025-accredited third-party lab
- Generic COA with no chromatogram, no MS data, or vendor in-house testing only
- Without MS confirmation, you can't verify the compound is actually MK-677. GHRP-6 mimics similar HPLC behavior
- Packaging
- Amber or opaque vial, crimped seal, printed lot number and expiration date
- Clear glass, screw-top cap, handwritten lot numbers
- Screw-top vials indicate non-sterile repackaging; clear glass allows UV degradation
- pH (Reconstituted)
- 6.0–7.0 in bacteriostatic water
- <5.5 or >7.5, indicating acidic synthesis residues or bacterial contamination
- pH outside 6.0–7.0 range signals either contamination or incomplete purification during synthesis
- Shipping Conditions
- Temperature-controlled cold chain with insulated packaging and cold packs
- Ambient temperature shipping, no cold packs, no insulation
- Peptides exposed to >8°C for >48 hours begin irreversible denaturation. Warm shipping is a deal-breaker